Ventilation control system
CA 1180590 A · Owner: Barber-Colman Company · Inventors: Moyer, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The unnecessary removal of heated or cooled room air by fume hoods is prevented during off-peak periods through a manual and automatic fume hood ventilating system. Ventilation (exhaust) air quantities are reduced in response to operator and/or automated programmed control of the exhaust fan shaft speed. The safety integrity of the fume hood system is improved by providing the operator with visual and audible dynamic feedback of the system operating status. Room air balance is maintained through subsequent reset of the room supply air coincident with exhaust air quantity adjustment. Building make-up air balance is possible using individual instantaneous exhaust flow summary …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted January 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.